Description
F168-8MX21-SF Powerhouse® MX Timing Pulley, 168 Teeth, 8MX Pitch
The F168-8MX21-SF is a 168-tooth 8 mm MX high torque timing pulley. It mounts with an industry-standard bushing, sold separately, machined from cast iron with a black oxide finish, built for 21mm wide belts. Machined from solid stock, never sintered or powdered metal. Powerhouse® MX pulleys run on the same high torque drives as Gates Poly Chain® GT® Carbon™ and Continental Synchrochain Carbon belts.
Specifications

Dimension key for this construction type. Values for this part number are in the table below.
| Specification | Value |
|---|---|
| Part Number | F168-8MX21-SF |
| Teeth | 168 |
| Pitch | 8 mm MX high torque |
| For Belt Width | 21mm |
| Pitch Diameter | 16.8429 in |
| Outside Diameter | 16.7799 in |
| Bore | Accepts SF bushing (not included) |
| Face Width | 1.203 in |
| Overall Length | 2 in |
| Hub Diameter | 33.8 in |
| Construction | ACHE Sprocket with Quick Disconnect Hub |
| Material | Cast Iron (no sintered or powdered metal) |
| Finish | Black Oxide |
| Weight | 33.8 lb |
| Country of Origin | United States. ISO 9001:2015 certified manufacturing. |
Applications
- High torque, low speed drives replacing roller chain
- Air cooled heat exchanger (ACHE) fan drives
- Oil and gas pumping equipment
- Material handling and conveyor drives
- Weight-sensitive drives (webbed, lightened construction)
Belt Compatibility
The F168-8MX21-SF runs 8 mm MX high torque belts in 21mm width. The pitch is standardized, so belt and pulley brands can be mixed.
Cross Reference
The F168-8MX21-SF interchanges with these equivalent part numbers, per published manufacturer interchange data:
| Manufacturer | Equivalent Part Number |
|---|---|
| Dodge® | F8MX-168S-21-SF |
| Martin | F8MX168S21-SF |
| Gates® | F8M-168S-21 |
| Mitsuboshi | F168-8MX21-SF |
| Powerdrive | F168-8MX21-SF |
| Continental (ContiTech) | 168G-8M-21-SF |
Always verify dimensions and bore size before substituting part numbers across manufacturers.
Buying in bulk? Save on volume.
Multi-unit and OEM quantities qualify for volume discounts. Call or email for a quantity quote.
Frequently Asked Questions
What belts fit the F168-8MX21-SF pulley?
8 mm MX high torque timing belts in 21mm width from any manufacturer. The pitch is standardized, so belt and pulley brands can be mixed.
Does the F168-8MX21-SF replace the Dodge F8MX-168S-21-SF?
Yes. Published interchange data crosses the F168-8MX21-SF directly to the Dodge F8MX-168S-21-SF, as well as Martin F8MX168S21-SF, Gates F8M-168S-21, Mitsuboshi F168-8MX21-SF. Verify dimensions and bore before ordering.
Does the F168-8MX21-SF ship from Houston?
Yes. Stock items ship same day from our Houston, Texas warehouse. Call (888) 203-2358 to confirm availability.
Need a quote on F168-8MX21-SF?
Houston warehouse, same-day shipping on stock items.
Call (888) 203-2358Powerhouse® is a registered trademark of its owner. Poly Chain®, GT®, and Carbon™ are trademarks of Gates Corporation. Synchrochain is a trademark of Continental. All third-party part numbers and trademarks referenced are the property of their respective owners. References are for compatibility identification only and do not imply affiliation or endorsement.
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